Linux started as a hobby kernelThe core of an operating system that manages hardware, memory, and processes — everything else depends on it. for 386 PCs and grew into the OSOperating system — software that manages hardware and provides services to applications. behind AndroidGoogle's open mobile operating system — the dominant platform for smartphones worldwide., cloud servers, and supercomputers. Torvalds' open development model on Usenet and later GitA distributed version control system — commits, branches, and merges for tracking source code history. became the template for community-driven systems software.

Linux is the most widely deployed operating system kernelThe core of an operating system that manages hardware, memory, and processes — everything else depends on it. in history.

It proved open-source OSOperating system — software that manages hardware and provides services to applications. development could outpace proprietary UnixAn influential multitasking OS from the 1970s — files, pipes, and C shaped Linux, macOS, and BSD..